Slitting roll of machines for forming expanded metal



April 10, 1928. 1,665,349 I H. M. GERSMAN ET AL spnnne Rom. 0F mcnmms FOR FORMING EXPANDED METAL Filed March 19, 1926 2 Sheets-Sheet 1 I April 10, 1928.

H. M. GERSMAN ET AL SLITTING ROLL OF'MACHINES FbR FORMING EXPANDED METAL Filed March 19. 1925 2 Sheets-Sheet 2 Patented Apr. 1928.

UNITED sA-rs a oF icE.

HARVEY m. GERSMAN, or BUFFALO, AND" WILLIAM H. KLOCKE, on NEW YoRK, N. .Y.',

'nssrenons'ro KALMAN STEE COMPANY, 1110., or CHICAGO, ILLINOIS, A con- ]?ORATION OF DELAWARE.

,, SLITTING ROLL F MAoHmns r013. ronmme-nxrannnn METAL.

Application filed March 19, 1926. Serial No. 98,024.

This invention relates to improvements in the slitting rolls of machmes for. forming expanded metal and proposes a roll of spe cial utility in connection with the production of expanded metal of the kind disclosed In the patent to Harvey M. Gersman No. 1,562,157, dated Nov. 17, 1925, but whichmay also be used to advantage in theproduc tion of expanded metal of other forms .wherein the blank is provided with parallel rows of slits in break joint or staggered relation. The principal object of the invention is to provide a slitting roll by which slits of conl5 stant determined length and pitch may at all times be produced. A further object is to provide a slitting roll whose diameter may be maintained substantially constant not-' withstanding repeated. resharpening.

WVith the above objects in view, the invention consists in a slitting roll having spaced cutting rings, each composed of radially adjustable elements of such form and relation as to provide for a continuous ring circum ference in any position to which they may be adjusted and also to provide forany diameter of the, ring which may be determined upon; also in a slitting roll having cutting rings, each. composed of grooved radially adjustable cuttingelement-s of such form and arrangementas to insure the constancy of the length and pitch of the slits; and also in various details of: structure and assembly which promote-facility inthe adjustment of the cutting elements and security in the maintenance of-their adjustment.

An embodimentof the invention is illustrated in the accompanying drawings where in: I

F ig. 1 shows a pair of cooperating slitting rolls, the'upper roll being shown in longitudinal section and the lower roll inside elevation.

Figs. 2 and 3 are cross-sections of theslitting rolls taken on 'the'lines 2-2 and 3-3 of Fig. 1. I

Fig. 4 is a fragmentary developed sectional View of a number of adjacent cutting rings of the upper roll, the same being taken on the line 4-4 of -FigQ 2.

Fig. 5 is a fragmentary plan'view of the slitted blank. I

Fig. 6 is'a fragmentary cross-section of the upper slitting roll showing the elements of cutting elements.

The blank B is shown in Fig. 5 as proin-t-he direction of their length and are arone of the cutting rings after successive adjustments thereof.

Figs. 7 and 8 are perspective views of the two forms'of cutting elements of which each ring of the upper roll is composed.

Fig. 9 is a perspective view of one of the shuns which determine the vided with longitudinal slits 10 which aline rangedin parallelrows, the slits of one row being 1n staggered; or break-joint relation to the slits of adjacent rows. The bonds of the expanded metal are subsequently provided by the material indicatedsat 11 which l es between the ends of the adjacent alining slits and between the corresponding slits of the alternate rows. Such a blank is available for diamond mesh lath of ordinary form as well as for special forms of lath including that shown in-said Gersman patent according to which the slitted blank is subsequently formed with transverse corrugations, the apices of which are provided by the bonds [1, and is thereafter expanded to form the finishedprodu'ct. i

As heretofore constructed, the upper slitting roll of metal expanding machines is formed .with continuous integral -annular cutters provided with radial grooves which position of the.

determine the location of the bonds 11 in the blank, the cuttingedges intermediate the grooves cooperating with the plain annular cutters of the lowerroll to form the slits. As these cutters become Worn 'and are resharpeued, their peripheries are necessarily reduced and with the reduction of the'peripheries of the cutters of the upper roll there isa decrease inthe peripheralspacing of the grooves. This results also in a decrease in the length of the cutting edges between the grooves and corresponding alterations in the length and pitch of the slits, the

'word pitch being used to designate the distance between the centers of the slits of each row. With all kinds of lath this varia tion in the length. and pitch of the slits is disadvantageous and it is particularly dis advantageous in the production of lath of the kind shown in said Gersman Patent No. 1,562,157, in which the symmetrical form of the corrugationsrelative to the-bonds 1t necessitates a substantial measure of precis on sharpening of the cutterelements.

, ting ,rin

in the slitting of the blank. The present slitting rolls overcome the above ob ections and enablethe length and pitch of the slits to be maintained constant and as originally spacing rings 17; and the cutting'rings of one roll operate in the clearancesbetween those of the other roll, thereby v to act with shearing efiect. The body portion of each roll isformed with longitudinal grooves 18 which are spaced equidistantly and extend a the full length, of said body portion. Each.

of these grooves has parallel sides and serves as a keyway to accommodate the shanks 19 of the cutters 20 as will be more fully described.

, The upper roll determines theeirtent and location of the slits and the bonds, each cutting ring having for this purpose a plurality of spaced. grooves edges betwee break-Joint relation of the The cutting-rings" of the Avardiliefll g v edge as adjusted outwardly along grooves providin sultant bondproviding slits, the slitting-operatlon thus conforming ,The cuttin rings- 'ranged-- alternately cutting elements 20 21', 22, 23 and 24 which extend inwardl. from the periphery, the t 'e grooves cooperating with the edges of thecutting rings of the lower roll to cut the'slitsin the blank, and the for regularly recurring interruptions of t portlons between the to the ordinary practice. are each adapte to participatefln t e cutting oftwo -row's of slits and the grooves are arranged alternately on opposite sides of each cutting ring,

as bestshown. in Fig; 4, for the staggered or u each com d of two setso cutting elements 20 and 25, those of one setbeing'artothose of the other. The

thereby providing the elements 25 are of reciprocal wedge form. edges are curved In both -sets the working along arcs of'the Tde'termmed circumference of the cutting ring. Thus each element 20 has sides 26 which ward the working, edge andeach element'25 has sides-27 which extend .di vergently tothe elements'20. elements ma he radial lines clination to the-sides 26 of As thus formed the cutting e cutting action with reper roll are are of wedge form andextend convergently to-' and conform m in in 'all positions maintain the continuity of v the cutting rin in which they are moorporated. .The e ements 20' are adjusted in the first instance and their movement is inif parted to the 'elements'25 which are thus supported against inwardodisplacement by the elements'20. Th form of the cutting ele ments as above described is such that adjustmentthe elements 20 have substantlally twice the movement of the elements 25 and therefore the grooves 21 in the elements 20 and the working portions throu grooves extend aresubstanti length of the grooves 22,28 and 24and the working portions of order to facilitate the adjustment of the cutting" elements and also. to key the cutting rings to the body 15, the-elements 20 are rovided'with inwardly extending shanks 19 which fit conform'ably-in the; grooves 18.

The outward adjustment of the cutters 20 is the elements 25. In

h which the y twice the preferably 'efiected by meansoffishims 28 fitted in' the grooves 18- one of these shims being shown in Fig. 9. Each shim is ofthe thickness to adjust the "ments"20 asingle shim is used, the length A of the elements 20 being such that several adjustments are possible. 7 the full-length ofthe grooves 18 and each have a sertion;

The shims extend- 5 i inted end 29 to facilitate their in a v The-first shims are laid on the bot: ,v

under'the shanks 19,

.90 elements 20 the required distance and for each adjustment of. a longitudinal row of eletoms of the grooves and the succeeding shims are laid on" the preceding shims, thereby permitting any desired'outward adjustment of the cuttin elements to be efiected, as clearly shownin. ig. 6. Ineach adjxistmentthe'enttingelements are moved to positions wherein their working edgesarelocatedbeyond the norms-I or determined circumference of the cutting ring, the projection beyond such circumference being greater as to the elements 20 than as torthe elements 25. The-cutting elements thus adjusted are thereupon-sharp ened untiltheir cutting edgesare in perip eral alinementin arcs which conform to the;

normal or determinedcircumference of the f 1 cutting ring. r a V a The constancy'of the pitch and lengthof the slitsin connection with-all adjustments of the cutting elements is provided-for by suitable arrangement of the grooves in said elements. Thus the grooves 21 of each cutting element-20 and the intermediate groove '23 ofeach cutting element 'and coincide inf location;

axes along which the m ecuve cutting elements are movable; and e outer grooves 22 fand 24 of each cuttingelement 25 are .paral lel to the-radial groove'23. thecuttin elements are moved radially outward-in a u stment the pitch ofthej gro0ves'21and 23 w1ll': remain' constant in any concentric an nular line, because along'jaliy sueh the fan 25ektend radially with the radiallikewise have constant peripheral extent of the cutting elements 25 will decrease and the peripheral extent of the cutting elementsQO will increase in compensating degree, the inclination of the sides of the cutting elements being selected to determine this result. The parallel relation of the grooves 21.

As there is a certain tolerance in respect to the pitch of the slits in the blank it is" practical to have two or perhaps three sharpcnings of the cutters between the adjustments thereof.

The spacing rings 17 are provided with a suitable number of tangs which engage in corresponding grooves 18 of the roll body and carry the driving strain or at least share it with the cutting elements 20. Each spacing ring is formed. with radial slots 31 which aline. with the cutting elements 25.

At the ends of the roll body end heads-32 are arranged, these beingsimilar in form-to the spacing rings but'being of greater thickness. The end heads are formed with tangs 33 which fit in the grooves 18 of the roll body and also with radial slots 34 which aline with the radial'slots of the spacers 17. Each cutting element 25 is provided with a centrally located hole 35 in alinement with corresponding slots 31 and 34 of the spacers and end heads. Tie rods 36 are passed through the alining holes and slots of the spacers, cutting elements'and end heads and nuts 37 are provided at the ends of each tie rod for use in drawing the end heads against the end cutting rings, thereby to secure thecutting elements against radial displacement.

Lengthwise displacement of the cutting rings and spaclng ringsis prevented by collars 38 and 39 fitted on the spindles-'14:

and bearing against "the end heads. The collar 38 preferably has ashrunk fit on its supporting spindle and the collar 39 pref-- erably has a threaded fit and is backed by a similarly fitted lock collar 41. The collars 38 and 39 are formed with recesses 40 which provide suitable clearances for the nuts 37. 'When it is desired to readjust the cutting elements the nuts 37 are backed ofl in order to loosen the tie rods and permit radial movement thereof, the collars 39 and 41 are removed in order to expose the adjacent ends of the grooves 1.8, the shi1ns28 are fitted in said grooves to effect the ad- 'justment of the cutting elements in the manner described, and the nuts 37 are then tightened to secure the parts as before. i 0

The lower roll is of the same construction as the unuer roll cxcent that its utting ele- 1. A slitting roll for-use in metal expand- 7 ing machines having cutting rings, each consisting of cutting elements mounted for out.- ward adjustment with respect to the periphery of said roll and of such form as to maintain the continuity of the ring in any posi-' tions of outward ad ustment. 2. A slitting roll for use in metal expand-- ing machines having cutting rings, each consisting of cutting elements mounted for radial adjustment and of reciprocal wedge 3. A slitting roll for use in metal expanding machines comprising a roll body and cutting rings mounted thereon, each cutting ring. consisting of cutting elements mounted for adjustment outward with respect to said body and of such form as to maintain the continuity of the ring in any positions of outward adjustment. i

4. A slitting roll for use in metal expanding machines comprising a roll body and cutting rings mounted thereon, each cutting ring consisting of cutting elementsmounted for radial adjustment and of reciprocal wedgei'orm. r

5. A slitting roll for use in metal expands ing machines comprising a roll'body, cutting rings mounted thereon and each comprising outwardly adjustable cutting ele-v rings to hold said elements against outward displacement. v

6. A slitting roll for use in metal expand; ing machines comprising a roll body, cutting rings mounted thereon and each lncluding outwardly adjustable cutting elements formed with apertures, spacing rings mounted. between the cutting rings and formed with slots extending in the direction of adjtistment of said elements, tie rods extending through said apertures and slots, and means at the endsof said tie rods cooperating therewith to exert clamping pressure on said cutting and spacing rings and thereby hold said elements against outward-displacement.

ing machines comprising a roll body, cut- 7. A slitting roll for use in'metal expandfitted in said. grooves.

l cutting rings and spacing rings against longitudinal displacement. 8. A slitting roll for use in metal expanding machines comprising .a roll body. provided with grooves extending between its ends and cutting rings, each including) wardly adjustable elements having 5 anks 9. A slitting roll'for use'in metal expanding machines comprising a roll body provi'ded with grooves extending between its ends and cutting rings,. eachcomposed of outwardly adjustable cutting elements, cer-' vided with grooves extending tain of which have shanks fittedin said grooves and in then outward adjustment ef- .fect the adj ustment of the others;

10. A slitting roll for usein metal ex- 7 panding machines comprising a roll body and cutting rings-mounted thereon, each.

11. A slittin'g roll'for use in metal e'xpandv ing machines comprising a roll body pro+ ends and cutting rings, each includin out; wardly adjustable elements having 3 ianks fitted in said grooves in combinat on with. ves under maintain tures. M

shims for arrangement in said gro said shanks-in order to-efiect an i the adjustment of said elements. 12. A- slittitng 'roll'for' use in' metal. expanding machines having cutting rings, each consisting of cutting elementsmounted for out wedge form, radial groove colnclding with its axes of adand extendlng to its the i'oll body having parbetween. its

adjustment outward, with respect to the periphery of said roll maintain the continuity of the ring in'any positions ments having grooves extending through their working portions to their cutting edges to a determined conand of suchjform as to j of outward adjustment, said .ele-

and of such arrangementthat their pitch is constant with respect 45 I centric line in any positions of outward adjustment of said elements.

' 13. A slitting rollfor use in metal ex- I p'anding machines having cutting rings,

each consisting of cutting elements mounted for radial adjustment and of reciprocal each cutting element havmg a justable movement working edge.

ing-macliines having cutting rings, each consisting of the. elements of outwardly tapering cutting-elements mounted for Y ra- :Elial adjustment-and; of reciprocal wedge orm form: each having. a radialgroove extending;

to its working edge and coinciding with it's" axes of adjustable movement mg a radial groove extending to its working edge and coinciding with its axes of admovement and also having a groove justable and the ele- -.ments of outwardly flaring form each-havat each sideof said radial groove 'and parallel thereto. i

In testimony whereof we afiix our signa- HARVEY M. GERS'MAN; j WILLIAM :KLOCKE;

. 55;- 14. A slittingroll for.:use in metal expand- 

